Does Baphuon temple really converted to a Buddhist temple?

When I was watching some youtube video I heard Baphuon was converted into Buddhist temple. But It's hard for me to believe it. My question is why Buddhists would have to convert other religious places to their own. Here in India mostly shiva temples was Buddhist places. Conversely picture is different and even shiva concept is copied from Buddha. That's why I have asked. Please tell me if it is truth or false if anyone have studied this architecture.